<template>
  <div class="body1">
    <div class="no-print el-button-print">
      <el-button @click="exportPDF">导出为pdf</el-button>
    </div>
    <div class="body2" id="pdfDom" :class="{ 'pdf-export': isPdfExport }">
      <div class="title">
        <div class="biaoti">卷 内 备 考 表</div>
      </div>
      <table class="tableStyle">
        <tbody>
          <tr style="height:880px;">
            <td colspan="2" style="text-align: left;vertical-align: top; position: relative; padding-top: 5px;">
              <span>&nbsp;本卷情况说明：</span>
              <el-input type="textarea" v-model="form.v1" :rows="v1Config.maxLines"
                @keydown.native="handleKeyDown('v1', $event)" @input="handleInput('v1', $event)"
                @paste.native="handlePaste('v1', $event)" class="el-textarea-hidden"
                style="white-space: pre;overflow-x: auto;font-family: monospace;" wrap="soft" />
              <div
                style="position: absolute;width: 230px; bottom: 120px;right: 20px; display: flex; justify-content: space-between; align-items: flex-end; margin-top: 20px;">
                <div style="display: flex; align-items: flex-end;">
                  立卷人：
                  <SignatureField label="签名1" sign-type="sign1" :img-url="form.img1"
                    @update:imgUrl="form.img1 = $event" />
                </div>
              </div>
              <div
                style="position: absolute; width: 230px; bottom: 70px; right: 20px; display: flex; justify-content: space-between; align-items: flex-end; margin-top: 20px;">

                <div style="display: flex; align-items: flex-end;">
                  检查人：
                  <SignatureField label="签名2" sign-type="sign2" :img-url="form.img2"
                    @update:imgUrl="form.img2 = $event" />
                </div>
              </div>
              <div
                style="width: 230px; position: absolute; bottom: 20px; right: 20px; display: flex; justify-content: space-between; align-items: flex-end; margin-top: 20px;">
                立卷时间：
                <editable-textarea :text="form.time1" param-type="YYYYMMDD1" class="lijuan-date"
                  @send-to-parent="receiveFromChild"></editable-textarea>
              </div>
            </td>
          </tr>
        </tbody>
      </table>
    </div>
  </div>
</template>

<script>
import EditableTextarea from "@/views/template/EditableTextarea";
import { agencyName, sealName } from "../../utils/publicName.js"

import SignatureField from "@/views/template/SignatureField";
import { createInputLimiter } from '@/utils/limitInput';

export default {
  components: {
    EditableTextarea,
    SignatureField,
  },
  created() {
    //调用父页面函数获取文书数据
    window.parent.getTemplateData((data) => {
      this.form = data;
    })
    //将方法暴露在初始化加载中
    window.postForm = () => {
      this.postForm();
    }
    this.v1Config.inputLimiter = createInputLimiter(this, {
      maxLines: this.v1Config.maxLines,
      charsPerLine: this.v1Config.charsPerLine,
      maxLength: this.v1Config.maxLength,
      propName: 'form.v1'  // 直接指向form.v1
    });
  },
  mounted() {
    window.parent.changeTemplateDow();
  },
  data() {
    return {
      agencyName: agencyName,
      sealName: sealName,
      form: {},
      isPdfExport: false, // 控制打印样式
      v1Config: {
        maxLines: 28,
        charsPerLine: 32 * 2,
        maxLength: 28 * 32 * 2,
        inputLimiter: null,
        displayText: ''
      },
    };
  },
  methods: {
    // 导出为pdf
    exportPDF() {
      this.savePDF()
        .then((blob) => {
          const blobUrl = URL.createObjectURL(blob);

          // 先预览
          const previewWindow = window.open(blobUrl, '_blank');

          // 自动下载
          const fileName = `卷内备考表.pdf`;
          const downloadLink = document.createElement('a');
          downloadLink.href = blobUrl;
          downloadLink.download = fileName;
          document.body.appendChild(downloadLink);
          downloadLink.click();
          document.body.removeChild(downloadLink);

          // 监听预览窗口关闭后释放内存
          if (previewWindow) {
            const timer = setInterval(() => {
              if (previewWindow.closed) {
                clearInterval(timer);
                URL.revokeObjectURL(blobUrl);
              }
            }, 1000);
          } else {
            setTimeout(() => URL.revokeObjectURL(blobUrl), 10000); // 兜底释放
          }
        })
        .catch(error => {
          console.error('导出PDF出错:', error);
          alert('导出失败，请重试或联系管理员');
        });
    },
    savePDF() {
      this.isPdfExport = true; // 激活PDF样式
      return new Promise((resolve, reject) => {
        this.$nextTick(() => {
          import('html2pdf.js').then((module) => {
            const html2pdf = module.default;

            //获取所有需要替换的 el-input
            const elInputs = document.querySelectorAll('.el-input__inner, .el-textarea__inner');

            //存储原始元素和它们的父节点，方便后续恢复
            const originalElements = [];

            elInputs.forEach((input) => {
              const div = document.createElement('div');
              div.style.whiteSpace = 'pre-wrap'; // 保留换行
              div.style.fontFamily = '仿宋';
              div.style.fontSize = '5mm';
              div.textContent = input.value; // 保留原内容（自动处理 \n 换行）
              div.style.lineHeight = '1.3';

              // 替换 el-input，并存储原始元素
              originalElements.push({
                parent: input.parentNode,
                original: input,
                replacement: div,
              });
              input.parentNode.replaceChild(div, input);
            });

            // 配置选项
            const opt = {
              margin: 0,
              image: {
                type: 'jpeg',
                quality: 0.98
              },
              html2canvas: {
                scale: 2,
                logging: false,
                useCORS: true
              },
              jsPDF: {
                unit: 'mm',
                format: 'a4',
                orientation: 'portrait'
              }
            };

            const element = document.getElementById('pdfDom');

            // 生成PDF Blob对象
            html2pdf()
              .set(opt)
              .from(element)
              .toPdf()
              .get('pdf')
              .then((pdf) => {
                const blob = pdf.output('blob');

                resolve(blob); // 返回Blob对象
              })
              .catch((error) => {
                reject(error);
              })
              .finally(() => {
                this.isPdfExport = false; // 恢复原始样式
                // 恢复原始input
                originalElements.forEach(({ parent, original, replacement }) => {
                  parent.replaceChild(original, replacement);
                });
              });
          }).catch((error) => {
            reject(error);
            this.isPdfExport = false;
            originalElements.forEach(({ parent, original, replacement }) => {
              parent.replaceChild(original, replacement);
            });
          });
        });
      });
    },
    //父页面提交按钮将调用此方法，此方法将文书数据回传到父页面的请求方法中
    postForm() {
      this.savePDF()
        .then((blob) => {


          // 创建FormData并添加文件
          const formData = new FormData();
          formData.append('file', blob, '卷内备考表.pdf');

          window.parent.postTemplateDate(this.form, formData);
        })
        .catch(error => {
          console.error('整个保存PDF出错:', error);
        });
    },
    handleKeyDown(field, e) {
      const config = this.v1Config;
      config.inputLimiter.handleKeyDown(e);
    },
    handleInput(field, value) {
      const config = this.v1Config;
      this.form[field] = config.inputLimiter.handleInput(value);
    },
    handlePaste(field, e) {
      const config = this.v1Config;
      config.inputLimiter.handlePaste(e);
    },
    //选择日期时间
    receiveFromChild(data, type) {
      const TypeMap = {
        'YYYYMMDD1': 'time1',
      };
      if (TypeMap[type]) {
        this.form[TypeMap[type]] = data;
      }
    },
  },

};
</script>

<style scoped>
:deep(.el-button-print .el-button) {
  display: inline-flex !important;
  visibility: visible !important;
  opacity: 1 !important;
  width: auto;
  min-width: 100px;
  height: auto;
  padding: 8px 15px;
  background: #fff !important;
  color: #000 !important;
  border: none;
}

:deep(.el-textarea__inner) {
  box-shadow: 0 0 0 0;
  color: black;
  padding: 0;
  font-family: "仿宋", serif;
  font-size: 5mm;
  overflow-y: hidden;
  line-height: 1.3;
}

:deep(.el-textarea-hidden .el-textarea__inner) {
  box-shadow: 0 0 0 0;
  color: black;
  padding: 0;
  font-family: "仿宋", serif;
  font-size: 5mm;
  overflow-y: hidden !important;
  resize: none !important;
  height: auto !important;
}

.input-container {
  width: 100%;
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
}

.inputStyleNoLine {
  border: none;
  outline: none;
  padding: 0px;
}

.typeSpan {
  cursor: pointer;
  font-size: 5mm;
}
</style>
